fix(rendering): isolate world selection transactions

Keep shared private entity viewports outside the normal-world picking product and make the injected spatial-pin retry test independent of the production frame clock.

Co-Authored-By: OpenAI Codex <codex@openai.com>

tests/AcDream.App.Tests/Streaming/LandblockPresentationPipelineTests.cs

@@ -900,7 +900,8 @@ public sealed class LandblockPresentationPipelineTests
             nearRadius: 0,
             farRadius: 0,
             onLandblockLoaded: _ => liveRecoveryCalls++,
-            ensureEnvCellMeshes: _ => replayCalls++);
+            ensureEnvCellMeshes: _ => replayCalls++,
+            workBudgetOptions: GenerousWorkBudget());
 
         Assert.Throws<InvalidOperationException>(() => controller.Tick(0x60, 0x60));
         Assert.True(state.IsNearTier(landblockId));